Watch out Brad Pitt! John Mayer's swooping to steal yo girl. According to Perez Hilton, Jennifer Aniston and Mayer were spotted sharing a dessert together on Thursday night just days before the Oscars. Aniston and Mayer dated in 2008 for just 6 months. This was just after Mayer and Jessica Simpson's relationship ended and not too long after Pitt and Aniston divorced. Pitt attempted to catch Aniston's attention at the Golden Globes but it looks she's now giving that attention to another ex.